Paper material coated with leaf metal



F. TSCHEIKE.

PAPER MATERIAL COATED WITH LEAF METAL- APPLICATION FILED JUNE 6.1917.

1,376,737. nted M y 3,1921.

fijQZZaA y UNITED STATES PATENT. orrlcs.

FRITZ TSGHEIKE, 0F FUERTH, BAVARIA, GERMANY, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE CHEMICAL FOUNDATION, INC., .A CORPORATION OF DELAWARE.

YAIER MATERIAL COATED WITH LEAF METAL.

To all whom it may concemz Be it known that I, FRITZ TscHEIKE, director, subject of the German Emperor, residing at Fuerth, Bavaria, Germany,-have invented certain new and useful Improve-i ments in Paper Material Coated with'Leaf' Metal, of which the following is a specification. I

- My invention relates to a new product resulting from a process of coating blank material as, for instance, paper with leaf metal or other surface-layer and the object of my invention is to remove certain disadvantages connected with similar processes heretofore in use and to secure certain advantages which are lacking in those processes and the products obtained thereby, the said disadvantages and advantages being duly detailed and set forth in the following description of my new product.

In describing my said invention I refer to the drawing herewith in which Figure 1 is a diagram in vertical section illustrating one mode of carrying out my invention and Fig. 2 another diagram in vertical section illustrating" a modification.

Heretofore in coating paper or other material with leaf metal the paper received a preparatory painting of bole or other pigment. The boled paper, or eventually the unboled paper, was by hand provided with a layer of sizing; thereupon the operator would mount the leaf metal upon the sticky side of the paper, blowing against the leaf metal to make the same stick smoothly and fast to the paper.

There are, however, a number of serious disadvantages connected with this process which are set aside in my invention In accordance therewith the blank, for instance,

the paper receives its preparatory sizingby means of a suitable apparatus, as a varnishing machine, with material which reaches its full'adhesive and cementing power only under certain controllable condltions for 'ex-. ample at a temperature which is above the" ordinary temperature of the air; As such cements or adhesives I consider certain resinous substances soluble in volatile agents,'as alcohol, benzin, or the like, also waxes and greases which become adhesive on being warmed or heated as, -for instance, shellac, copal, varnish and. other resinous materials, also bees-wax, tallow, pa'raflin and other substances. The prepared paper I conduct Specification of Letters Patent.

over a heating unit and at the same time I provide itwith the foil which is thus done at the moment when the adhesive has its greatest adhering power, the heating being continued as long as the process-0f foiling requires. After leaving the heater the article is at once dry and ready for use and its surface is'entirelysmooth and brilliant.

The coating may further be done by covering the blank with a solution of resin in a rapidl evaporating liquid and then applyin the oil while the adhesive layer is moist.

Figs. 1 and 2 illustrate the course which I refer in carrying out my invention.

he paper provided in advance, as mentioned, with an adhesive material is wound upon a reel 1 (Fig. 1) and the web a issued therefrom is stretched over a cylinder 2 preventing rolling-up of the paper, and by means. of the reel or roller 3 guided to a I Patented May 3; 1921. Application filed June 6, 1917. Serial No. 173,153.. l

heater 5, preferably a hot or heatable flat the temperature of the web and of the adhesive'layer thereon which thus obtains its maximum adhesive power. In front of the heater there may be placed a worker whose duty is to coyer as much of the sticky blank with the intended foil, as, for instance, leafsupport or polished steel platewhich raises metalyas the size of a heater may permit.

Or instead of by the worker the mounting of the leaf-metal may be effected by means of a suitable machine. For pressing-on the leaf-metal or whatever foil may be used, I prefer a' heavy steel-plate exactly corresponding in dimension to the heater, to'be either used by hand or attached to a suitable machine. The said steel-plat which may be arranged for water-cooling and have a polished face will by its pressure against the prepared paper act as a coin-die in a mint so that the goldor other metal surface retains its full brilliancy. In addition, an almost seamless connection will be produced, because the heat and the strong pressure ,cause an amalgamation or welding of the metal. Instead of the steel-plate described a mechanically moved pressure-roller 4 may be used which rolls to and fro over the leaf-metal and willcause a firm connection between coat and paper. After leaving the heater the foiled papera, b may'be guided over the roller 6 and woundupon the roller 7. The operation of the paper web should "be intermittent, so that the paper does not i move during the time the worker covers it with the leaf-metal not over a heater, but

with the foil nor during the operation of the pressure-plate or pressure-roller. When a certain portion of the web has been foiled as described it may by the operation of a footor hand-lever or automatically by the upward movement of the pressure-plate, be fed forward for such a space as corresponds with the length of the coated portion whereupon the procedure as described may be repeated. T he'product received by and wound upon the roller? is ready for use.

A cold method may, however, be resorted to in foiling. The blank by a suitable machine provided with a layer of resin dissolved in a volatile agent, is conducted over the cold cylinder or over guide-rollers and provided 4 over a cold metal-plate or other base or surface. This should be done while the adhesive layer is moist. The result will be the same as with the hot method described except that a subsequent drying is required. In this case it may, however, be paste or glue of any kind which may be applied either by hand or mechanically.

When it is intended to foil paper with metal in rolls instead of in leaves, I reel the paper, when it has been provided with the adhesive layer as described, upon roller 8 shown in Fig. 2. From the said roller 8 I conduct the paper web a by the medium of rollers 9 and 10 over a heated cylinder or drum 15, a roller 11 being provided above or laterally to the same upon which the web 6' issuing from, the metal-roll is reeled up. The relative position and distance of the said roller 11 to the drum 15 should be such that the former joins in the movement of." the latter, the web issuing from the metalroller being thus automatically taken along. For this purpose the bearings of the roller 11 should be spring-actuated to "gradually reduce the distance, between it and the heated drum 15. Behind the roller 11 which may, however, move independently, the web a of paper and the web I) of plating metal run together about the continuously rotating heated drum 15. The latter only imparting to the adhesive its maximum adhesive power, a pressure-roll 12, preferably cooled, will make the connection between metal and paper webs inseparable. From the hot. cylinder the coated paper web a, Z) may be guided over the roller 13 and reeled up in V, perfectly cooled state on the roller 14.

The process described permits of foiling of all or any materials, particularly all sorts of paper from the finest tissue to the thickest quality in sheets or rolls, with any material as, for instance, aluminium, lead, zinc or other metal in leaves or rolls, orwith any fabric, wood, cork or, other substance, the strength and thickness of the adhesive layer to be varied as thenature of the respective material may require. .For coating paper with beaten metal one or two grams per square meter will be quite sufiicient. The

exceedingly thin layer'of resinous sizing be tion of moisture through the porous leafmetal and, consequently, no oxidation of the metal-surface, the latter retaining its original brilliancy.

The product obtained by the process described is free of waste and, in addition, is from a sanitary point of view particularly adaptedfor the packing ofarticles of food, because there is no paste or glue which would be liable to become acid or spoiled.

The product is also of great value for the manufacture of gilt tips or mouth-pieces for cigarettes, in book-binding, in the manufacture of card-board 0r paper-boxes and for many other articles. I

In the manufacture of cigarettes small spools. or bobbins of leaf-gold were heretofore used for gilt tips, the gold or gold bronze being either painted or strewn on the blank. The product was not of pleasing appearance, because the beautiful metallic brilliance was lacking. a

My invention removes these disadvantages entirely for it permits the leaf-metal to inseparably unite with the very thinnest silkor tissue-paper within the shortest time. The natural metallic brilliancy remains unimpaired. In addition, any waste is saved and working made easy and extremely cheap for the cigarette-maker.

The embossing-paper may be further improved by receiving on the metallic'side a covering layer of adhesive. powerof the same, though also reaching its maximum effectiveness at a raised tempera ture only, should be stronger than that of the sticking substance already present between the paper and metal.

The embossing-paper I lay with the metalside. on the blank intended for embossing and then apply the heated die. At the place where the die is applied both the intermediary sticking layer and the coverin sticking layer attain their res ective maximum sticking powers. That 0 the covering layer being greater than that of the inter-' mediary layer the metal is transferred from the embossing-paper upon the blank in tendedto receive the embossment- At the same time the sticky intermediary layer detaches itself at the respective place from the paper and coats the embossing. Incase of true leaf-metal this coat has the advantage thatit afiords a greater brilliancy while in case of imitated metal it protects the latter against oxidation.

' What I claim is 1. An article of manufacture. consistin of a layer of paper united with a layer 0 The adhesive leaf-metal by the layer of adhesive substance arriving at its maximum adhesiveness at a raised temperature and another layer of adhesive substance also arriving at its maximum stickiness under operating conditions such as by heat or by a solvent, said last named layer being of higher stickiness and facing said leaf-metal.

2. An article of manufacture consisting of a layer of paper united with a layer of leaf-metal by a layer of adhesive substance arriving at its maximum adhesiveness at a raisedtemperaturc and another layer ofadhesive substance, said last named layer being of higher stickiness and facing said leafmetal.

In testimony whereof I affix-my signature in presence of two witnesses.

FRITZ TSCHEIKE.

Witnesses:

FRITZ SOHOENTHAL,

OSCAR BooK. 

